Electric and pneumatic governor.



No. 850,329. I PATENTED APR. 1a. 1907. H. w. YOUNG.

ELECTRIC AND PNEUMATIC GOVERNOR.

APPLICATION FILED JAN.22, 1906.

8b 38 2SHEETS-SHEET 1.

F I I J 1 mine ses. lnvenior. yffarr yflg ouv q No. 850,329. PATBNTED APR.16, 1907. H. W. YOUNG.

ELECTRIC AND PNEUMATIC GOVERNOR.

APPLICATION FILED JAN.22, 1906.

2 SHEBTS-SHEET 2.

Fi .6 Fig-7 Mincsscs. I lnflentor ifw Harv WYoun i broken as soon as t niatic pressure, it is most momentary liability.

been accomplished without any ton-yoke from the A J seal a) iiiRltY W.

O'li lG, 9F PHILADELPHIA, PENNSYLVANIA, ASSIG. OR- TO JOHN l. REYBURN, OF PHILADELPEHA, PEN N SEZ'MVAN 1A..

Spe

ion of Letters Patent.

:atsn'tect .Arprli. 1.6, 1907.

To (all who???) it 71mg) concern:

Be it known that i, HARRY W. YOUNG, a

citizen of the United. States, rcsidingat Philadelphia, in the county of Philadelphia and 5 State of Pennsylvania, have invented certain new and useful improvements in Electric l Pneumatic GOVL nors, of whichihe ioilowing is a s 'iecification.

This invention relates to means operative so by pneumatic pressure to control the flow, of

electric current to the motor by which the pneumatic pressure is produced, the c'mcuit to the motor being; formed whenever there is a predetermined minimum pressure and he maximum pressure is reached, so that the pressure shall be con: stant between. a fixed maximum and minimum amount.

Where car-brakes are operated by pneul'iighly necessary to keep a uniform pressure, and especially so with urban traffic, where the stops are frequent, crossings numerous, and the danger of collisions with vehicles and pedestrians is of alit is also desirable that the means employed shall be simple and durable as Well. as thoroughly ellicient.

in. this invention the electrical control has liability of lestruction of any part by the electric cur: rent.

The invention is panying drawings,

JStIttilQtllIl the accomin which like parts are in 3 5 (heated by the same reference characters, and

wherein- Figure 1 is a side elevation. central vertical section of Fig. parts not insection.

Fig. 3 end of Fig. 1. Fig. 4 is an elevation view of the drop-weight, its guides, &c., looking from the left-hand end of 1. Fig. 5"isan elevation view of the guides, etc, for the pissame position as Fig. 4. Fig. 6 is afront view of the weight-suspension latch. Fig. 7 is a side view of Fig. 6. Fig. 8

a front view D Fig.- 9 is a side view of Fig. 8.

All of the parts are carried F ig. 2-is a 1 with some (See also line a a, Fig.

by abase-plate qevrcd to the diaphragm bya nut 6 and u I is an elevation of the right-hand oij'the yoke-suspension latch.

fit one end of the base-plate there is a washer 7 at one side and a hubbed plate 8 at the opposite side. The case has a hub 9 tapped to receive a follower 10, which bears against a spring 11, which abuts the hub of plate 8 at its opposite end, and a check-nut i2 secures the foiiower when it has heen'ad justed to cause the spring to force the diaphragm to resist the pneumatic.pressure op erating' against it through opening] 3 in communication with the air-reservoir. (Not shown.) Case .2 has a projection 14-, on which is fulcrumed a lever 15 by a, screw in. The lower end of the lever has a pin 17 passing through it and extending" beyond each side, and each side extension enters a slot 18, formed in 19 of stem 5 at each side of the lever end. Over the jaws is a yoke 20, secured to each jaw by a screw 11. At thev outer end of yoked!) there is a screw 22 with a checlenut 23 to bear against a spring 24, secured to lever 15. The object of this arrangement is to relieve spring 11 when subjected to severe pressure and prevent the loss of resiliency or the set of the spring.

Above projection 14 there is another projection 25, having a slot 26 to receive lever 15 with a screw 27 at its outer end to limit the movement of spring 11 against the diaphragm 4:. The screw has a check-nut 28.

At the opposite end of base-plate 1 from the diaphragm-case there is a stand 29, with a cylinder 30 mounted thereon and in communiczn tion with a passage 3 1 in the stand. The cylinder has a piston 32 with a hollow piston-rod 33. passing therethrouglywith a valve 34 suspended within the piston-rod by a pin 35 in a slot 36 of the suspension-rod, so that the valve can leave the piston-rod end open, as shown, or close the opening when the piston is to be forced upward. A chamber 37 is formed in stand 29 with an opening 38 to the passage 31. Avalve 39 controls the opening. The valvehhs an upper stem 40 projecting above stand 29 and a lower stem 41, guided in a nut 42, with a spring 43 around the stem to close the valve. From chamber 37 there is a pipe 44, communicating with pipe from the air reservoir to the-diaphragm. Cylinder 30 has a cover 46 and-vents 47. Piston-rod 33 has attached thereto a yoke 48 by screws 50 in its hub 4-9, and cushioning-rings. 51 52 of soft material are placed above and below hub 49. 52 abuts standard 53, secured to cylinder 30, (best seen in F ig. 3,) which guides the upper end ofi piston-rod 35.. rting 51 abuts cylinder-cover 46. These cushions deaden the blows incident to the rapid ascent and descent of yoke 48. Secured to stand 29 are guides 54 for yoke 48 to prevent any tendency to tur'n. Above standard 53 a bracket 55 (see Fig. 3) guides a screw-threaded rod 56, pivotally secured to the'upper end of lever 15. Pivotally supported on standard 53 is a latch 57, and on arm 58 of the standard is another latch 59 By reference to Figs. .6, 7, 8, 9, onan enlarged scale, it will be seen that these latches are supported on pins 60 between jaws 61 62 with a space between the latch and jaw 62 occupied by a spring 63 over pin 60, having extended ends, end 64 hearing against and forcing the latch for engagement and end 65 bearing against the latch-supports to insure the ends 64 in enforcement. As latch 57 has its hub toward its support, it is provided with a stop-pin 66 to limit the movement of the latch.

Yoke 48 has a horizontal extension 67 on its diaphragm side adapted to catch and elevate weight 68 after it has dropped to open valve 39, which admits pressure to carry up the piston, the weight being guided by rods 69 70, secured in base 1 and having a tie 71 at the top. A latch. 72 is secured to weight-68 and is adapted to engage latch 59 and support weight 68 when not resting on extension 67, which has a hole 73 to pass over and clear stem 40. Yoke 48 has a spring-catch 74, adapted to engage latch 57. Opposite projection 67 the yoke 48 has insularly attached thereto a bracket 75, to which is secured a yielding support 76 for carbons 77 78, adapted to contact with fixed carbons 79 80, secured in terminals 81 82 on stand 83, secured to base-plate 1 and carrying conductors 84 85.

Upon rod 56 there is an arm 86, adapted to press against latch 59 and secured in adjustment by check-nuts 87, and another arm 88, secured in adjustment by check-nuts 89, is adapted to press against latch 57.

The governor is represented at the time the electrical circuit is broken by an accumulation of maximum pressure upon the diaphragm 4. As the pressure against the diaphragm decreases the top of lever 1.5 will move toward cylinder 30, carrying rod 56, and arm 88 willpress the upper end of latch 57 to free it from spring-catch 74, the latch and catch now supporting yoke 48, piston 32, and its rod 33 and the movable carbons 77 78 out of contact with the fixed carbons 79 80 and breaking the circuit between con ductor 84 from the source of electrical energy and 85, leading to the compressor-motor.

\Vhile the decrease. of pressure has been going on arm 86 has traveled away from latch 59 andallowed its spring end 64 to move the latch into engagement with the latch 72 of weight 68 and to suspend the weight. When the allowed" minimum pressure has been reached, latch 57 and catch 74 will be disengaged, and the yoke, piston, and movable carbons will descend by gravity, the circuit will be reestablished, and the motor will 0perate the compressor. This will continue until dia'phragni 4 moves back lever 15, rod 56, and arm 86 to disengage latch 59 from latch 7 2 at the predetermined accumulation of maximum pressure. The'weight 68 w ll then descend by gravity to stem 40, open valve 39, and admit pressure to passage 31, close valve 34 and the piston 32, yoke 48 and its projection 67, weight 68, and carbons 79 80, will be carried up by pneumatic pressure and suspendedby latch 57 and catch 74, the circuit being broken and the motor stopped. These operations will be repeated as maximum and minimum pressures are reached.

The means herein employed enable a very fine graduation of maximum and minimum pressures, and the closing and breaking of the circuit is instantaneous.

I claim 1. In an electric and pneumatic governor,

a diaphragm operative by pneumatic pressure; a cylinder, a piston having a hollow piston-rod and a valve therein; fixed carbons having 'elrctrical conductors thereto and therefrom; movable carbons carried by the piston and its rod, and means operative by pneumatic pressure to lift the piston and the movable carbons and break the circuit upon the accumulation of a maximum pressure, and to drop the piston and the movable carbons and close the circuit when a minimum pressure is reached, substantially as and for the purposes specified.

2. In a governor, a diaphragm actuated by fluid-pressure; a cylinder, a piston in the cylinder actuated in one direction by fluid-pres sure, and in the opposite direction by gravity: fixed and movable carbons and electrical conductors therefor; and means operative by the diaphragm to release the piston and carbons for action by gravity to form the electrical circuit, and by fluid-pressure to break the circuit.

3. In a governor, a diaphragm actuated by fluid-pressure in one direction and by resilient means in the oppositedirection; a lever mtWab-le by the diaphragm, a rod thereto attached and arms on the rod; a cylinder having a piston and rod operative in one direction by fluid-pressure and in the opposite direction by gravity; a support: latches on the support which engage the arms aforesaid; a catch adapted to engage one of the latches; a Weight, and a latch thereon adapted to engage the other latch; fixed carbons having electrical conductors movable carbons supported by the piston and its latch: a support for the weight, also carried. by the piston, to the weights latch; a pressure-passage to the piston, a valve controlling the passage, a stem projecting from the falling of the weight, toopen the: valve,

admit pressure tothe cylinder, lift the piston and movable carbons and 'hrealrthe circuit.

4. "The combination ofa fluid-pressure diaphragm, a cylinder having a piston actuatedby fluid-pressure in one direction and by gravity in an opposite direction; movable carbons and a Weight elevated by the iston; fixed carbons and electrical con'uctors therefor; a fluid-passage to the cylinder and a valve. to control it; means to ens-- pend the piston and the carbons; HIBQRSEO release the piston and movable carbons to phrag1n, acylinder, a. piston therein, mov 20" form an electrical circuit, by gravity; and means to release the weightand b y its gravity open the valve andbreak the circuit.

In a governor,- a fluid-pressure 'dia-- able carbons supported by the piston, fixed l carbons and electr cal conductors, a Weight elevated by the piston, means to suspend the piston and movable cal'rbons until a lease the piston and carbons to act by gravity to form the electrical. corn'ie ction; means to suspend .the weight before the pistondescends, and to hold it in suspension until a predetermined increase of pressure is reached, nnd to. then release the Weight to act by gravity to apply pressure to the piston for its elevation the elevationof the carbons and the brcaliing" of the circuit.

v nnn'nnuni pressure is reached, and then to re- 6. In a governor, adiaphragni deflected in one direction by fluid-pressure, and in. the opposite direction by resilient means, means to adjust the resiliency, and'rneans forits "relief"when 'subjected; to extreme pressure.

7. In a governor, a cylinder mounted over a fluid-pressure passage and open to the same, a piston in the cylinder, a hollow piston-rod extending ,through the piston, a valve suspended from thepiston-rod to leave a free passage through the piston and its rod when the piston is not-subjected to pres sure, and to close. the passage When pressure is introduced intothe cylinder for the movement of the piston.

8. In governor, a stand, .a chamber in the stand, a valve in the chamber having a stern projecting above the stand, resilient ineans to close the valve, a fluid-pressure passage to the chamber, a fluid-pressure passage from the chamber and controlledby the valve; acylinder mounted above end open to the latter passage, a, plstonin the cylinder, and means operative by gravity to open the valve, admit, pressure to the cyl-- inder and operate the piston. In testnnony whereof I afi'ix my signature in presence of two witnesses; 

